Thank you for bolding them, as that is the important part of my post. Choosing the appropriate gear for a long fight/long dungeon/whatever and being unable to swap adds dynamics. That is why even on mage it is rare that I change gear. (usually only before a boss) It never even crosses my mind on DPS as I haven't taken the time to make gear sets based on Dlvl of what I'm fighting yet.

Gear you put on at the start should be an important decision. Could you picture your character stopping mid-fight like "Hold on a sec, I gotta change my shirt, pants, shoes, staff before I'm ready to take my next action!" Yes, I was a gear-whore in XI, i swapped for every single macro I had. This game does fine without it.